scholarly journals Model predictive control for optimal coordination of ramp metering and variable speed limits

2005 ◽  
Vol 13 (3) ◽  
pp. 185-209 ◽  
Author(s):  
Andreas Hegyi ◽  
Bart De Schutter ◽  
Hans Hellendoorn
Keyword(s):  
Model Predictive Control ◽  
Predictive Control ◽  
Ramp Metering ◽  
Variable Speed ◽  
Speed Limits ◽  
Variable Speed Limits ◽  
Optimal Coordination

An integrated control method based on the priority of ways in a freeway network

2016 ◽  
Vol 40 (3) ◽  
pp. 843-852 ◽  
Author(s):  
Minghui Ma ◽  
Shidong Liang
Keyword(s):  
Traffic Congestion ◽  
Control Method ◽  
Integrated Control ◽  
Adaptive Controller ◽  
Ramp Metering ◽  
Traffic Density ◽  
Variable Speed ◽  
Speed Limits ◽  
Variable Speed Limits ◽  
Freeway Networks

Traffic congestion is a common problem in merging regions of freeway networks. An adaptive integrated control method involving variable speed limits and ramp metering is presented with the aim of easing traffic congestion at merging regions. The problem of the imbalanced rights of ways of the upstream mainline and on-ramp at the merging region is solved by constructing the evaluation indices of congestion degree. Specifically, the traffic density and queue length of the upstream mainline and on-ramp are selected for use in the evaluation indices. Then, an adaptive controller is designed, integrating variable speed limits and ramp metering. The proposed method is tested in simulations considering a real freeway network in China calibrated by real traffic variables. The results show that the proposed adaptive integrated control method can prevent traffic flow breakdown and maintain a high outflow at the merging region during peak periods. The adaptive integrated control may lead to a 17% improvement in traffic delay.

Integrated Ramp Metering and Mainstream Traffic Flow Control on Freeways Using Variable Speed Limits

2012 ◽  
Vol 45 (24) ◽  
pp. 110-115 ◽  
Author(s):  
Rodrigo C. Carlson ◽  
Diamantis Manolis ◽  
Ioannis Papamichail ◽  
Markos Papageorgiou
Keyword(s):  
Flow Control ◽  
Traffic Flow ◽  
Ramp Metering ◽  
Variable Speed ◽  
Speed Limits ◽  
Variable Speed Limits

scholarly journals Integrated Ramp Metering and Mainstream Traffic Flow Control on Freeways Using Variable Speed Limits

2012 ◽  
Vol 48 ◽  
pp. 1578-1588 ◽  
Author(s):  
Rodrigo C. Carlson ◽  
Diamantis Manolis ◽  
Ioannis Papamichail ◽  
Markos Papageorgiou
Keyword(s):  
Flow Control ◽  
Traffic Flow ◽  
Ramp Metering ◽  
Variable Speed ◽  
Speed Limits ◽  
Variable Speed Limits
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